Plumbing question: Drainage vent for tiny house not hooked up to septic
I’m at the plumbing stage for my tiny house on wheels. After hiring a plumber, I see that he has an aav vent for both the kitchen sink and bathroom sink, in between the wall studs.
1) Considering that I am not hooking up to sewage (composting toilet), do I even need a vent?
2) My other concern is that the vent is inside my walls. I am going with the airtight approach, where intello will be taped over the insulation on the interior…so venting in an airtight wall doesn’t make sense to me. What would you guys do and can I just have the aav vent under my sink instead of inside the walls (since I will have no sewage)?
I attached a few pictures of what the vent currently looks like.
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